[U-Boot] [PATCH v3 9/9] dfu: Support larger than memory transfers.

[Tom Rini]

On Fri, Nov 30, 2012 at 08:01:12PM +0200, Pantelis Antoniou wrote:

> We didn't support upload/download larger than available memory.
> This is pretty bad when you have to update your root filesystem for
> example.
> 
> This patch removes the limitation (and the crashes when you transfered
> any file larger than 4MB).
> On top of that reduces the huge dfu buffer from 4MB to just 64K, which
> was over the top.
> 
> The sequence number is a 16 bit counter; make sure we
> handle rollover correctly. This fixes the wrong transfers for
> large (> 256MB) images.
> 
> Also utilize a variable to handle initialization, so that we
> don't rely on just the counter sent by the host.
> 
> Signed-off-by: Pantelis Antoniou <panto at antoniou-consulting.com>

To be clear, patches 1-8 are good and we should take, but this one means
we can't use FAT/EXT* partitions without more work.  I would suggest
that we set this part aside for a moment and perhaps limit transfers
that are larget than RAM to RAW only where we can write in chunks today.

-- 
Tom
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